Whenever my kids tell me how their teachers don’t want them to use Wikipedia as a source I redouble my effort to show them why Wikipedia is important and how it works. In particular, I make sure they understand how to look at the history of a page and to check out the discussion or “talk” page that sits behind the content page. Two principles of those pages are critically important. First, they are inclusive by allowing anyone to contribute to the process at least initially (on some controver...